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tester

noun
🔊/ˈtestə(r)/
🔊/ˈtestər/
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  1. a person or thing that tests something测试员；试验员；测试器；测试仪
    • testers of new software新软件测试员
  2. a small container of a product, such as perfume, that you can try in a shop to see if you like it（商店里的）小包装试用品（如香水）Topics Shoppingc2